This work was finically supported by the Project of National Science Foundation of China, NSFC (No. 51175393), the Fundamental Research Funds for the Central Universities and Self-determined and Innovative Research Funds of WUT (No. 2013-ZY-014).
We propose a simple and low-cost Fabry-Perot (F-P) fiber sensor based on an inner air cavity. The air cavity is fabricated at the fiber-tip by splicing a single-mode fiber and a hollow-core photonic crystal fiber (...